<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script>
			function aa(){
				var ss = '1';
				var ss = parseInt(ss);
				ss+=12;
				document.write(ss);
			}
			aa();
		</script>
	</head>
	<body>
	</body>
</html>
